Question 36 GLI02 - Mate of Unlimited Tonnage

The Correct Answer is A. **Explanation for Option A (Correct):** Inland Rule 34(c) of the U.S. Inland Navigation Rules specifies the required whistle signals for vessel operation in a narrow channel or fairway on the Western Rivers or where an agreement is necessary. When an overtaking vessel signals its intention to pass (e.g., sounding one short blast to pass on the starboard side), the vessel being overtaken must indicate agreement by sounding the same signal: **one short blast**. This signal serves as a confirmation that the overtaken vessel understands the intention and agrees to the maneuver. **Why Other Options Are Incorrect:** * **B) one prolonged, one short, one prolonged, and one short blast in that order:** This signal (the "danger signal" or General Prudential Signal followed by a maneuver signal) is not the standardized agreement signal. Furthermore, this specific sequence is the signal for a vessel approaching a bend or blind curve (Inland Rule 34(e)), not a signal of agreement to an overtaking maneuver. * **C) two prolonged blasts:** Two prolonged blasts is the correct signal used by a power-driven vessel leaving a dock or berth (Inland Rule 34(g)). It is not used to indicate agreement to being overtaken. * **D) two prolonged followed by two short blasts:** This signal is prescribed by the International Rules (COLREGs) as the signal of agreement to being overtaken (COLREG Rule 34(c)). However, the question is explicitly marked as "INLAND ONLY." Under U.S. Inland Rules, the agreement signal must be the same as the intended passing signal (one short blast for starboard passing or two short blasts for port passing).